It requires a thick skin to play group content in MMOs nowadays. If you don't perform perfectly, or at least can't avoid making mistakes, or even if you're not going fast enough for some people, it's common among the English queue that people will be *****.

To be frank, if you have difficulty dealing with the vitriol from those type of people, then I suggest moving to a Japanese server. It makes communication a little more difficult, but if you learn to use the autotranslate, it's not bad at all. And there are several Japanese servers with English speakers as well.

The reason I suggest that is because Japanese players are generally more polite. Most will usually avoid saying anything rude, favoring to remain silent. They will usually endure about 3-4 wipes before simply vote abandoning, and avoid any finger-pointing or rudeness.

Not all English speaking players are rude, but sadly it's a fact that English speakers are far more vocal and more likely to be rude and starting blaming others.